JPS62189056A - 磁界の均質性を改善する方法 - Google Patents
磁界の均質性を改善する方法Info
- Publication number
- JPS62189056A JPS62189056A JP61306680A JP30668086A JPS62189056A JP S62189056 A JPS62189056 A JP S62189056A JP 61306680 A JP61306680 A JP 61306680A JP 30668086 A JP30668086 A JP 30668086A JP S62189056 A JPS62189056 A JP S62189056A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- shim
- data
- coil
- measurements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 57
- 238000005259 measurement Methods 0.000 claims description 29
- 239000000126 substance Substances 0.000 claims description 19
- 238000012937 correction Methods 0.000 claims description 17
- 238000003384 imaging method Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 5
- 238000005481 NMR spectroscopy Methods 0.000 description 20
- 230000006870 function Effects 0.000 description 11
- 238000001228 spectrum Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 9
- 238000005070 sampling Methods 0.000 description 9
- 239000000523 sample Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 7
- 238000013480 data collection Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000004611 spectroscopical analysis Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005284 basis set Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 101150032700 pprA gene Proteins 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
- G01R33/485—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy based on chemical shift information [CSI] or spectroscopic imaging, e.g. to acquire the spatial distributions of metabolites
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/387—Compensation of inhomogeneities
- G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- High Energy & Nuclear Physics (AREA)
- Optics & Photonics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81607686A | 1986-01-03 | 1986-01-03 | |
| US816076 | 1986-01-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62189056A true JPS62189056A (ja) | 1987-08-18 |
| JPH0351172B2 JPH0351172B2 (enrdf_load_stackoverflow) | 1991-08-06 |
Family
ID=25219617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61306680A Granted JPS62189056A (ja) | 1986-01-03 | 1986-12-24 | 磁界の均質性を改善する方法 |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0230027B1 (enrdf_load_stackoverflow) |
| JP (1) | JPS62189056A (enrdf_load_stackoverflow) |
| DE (1) | DE3650381T2 (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02195386A (ja) * | 1989-01-24 | 1990-08-01 | Seiko Epson Corp | 液晶ビデオプロジェクター |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03501090A (ja) * | 1987-11-05 | 1991-03-14 | ユニバーシティー オブ クイーンスランド | Ｎｍｒ分光器の磁界均質化方法 |
| JPH01155836A (ja) * | 1987-12-14 | 1989-06-19 | Toshiba Corp | 磁気共鳴イメージング装置 |
| US4899109A (en) | 1988-08-17 | 1990-02-06 | Diasonics Inc. | Method and apparatus for automated magnetic field shimming in magnetic resonance spectroscopic imaging |
| DE4217496C2 (de) * | 1992-05-27 | 1994-06-16 | Bruker Analytische Messtechnik | Shim-Verfahren |
| US6288545B1 (en) | 1999-03-22 | 2001-09-11 | General Electric Company | Method and apparatus for calibration of RF and gradient field time delays |
| ITSV20000009A1 (it) | 2000-02-25 | 2001-08-25 | Esaote Spa | Metodo, attrezzo e sistema per l'esecuzione di misure di verifica e correzioni dei campi magnetici nei magneti per macchine per il rilevamen |
| DE10224192A1 (de) * | 2002-05-31 | 2003-12-18 | Fraunhofer Ges Forschung | Bildgebendes NMR-Verfahren sowie NMR-Vorrichtung |
| WO2011066652A1 (en) * | 2009-12-02 | 2011-06-09 | Nanalysis Corp. | Method and apparatus for producing homogeneous magnetic fields |
| KR101896085B1 (ko) * | 2017-08-11 | 2018-09-06 | 국방과학연구소 | 통신 디바이스 및 통신 디바이스에서 블라인드 등화 및 복조를 위한 방법 |
| CN110927642B (zh) * | 2019-12-05 | 2021-09-10 | 湖南迈太科医疗科技有限公司 | 磁共振成像的匀场控制方法、装置和系统 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102544A (ja) * | 1983-11-10 | 1985-06-06 | Hitachi Ltd | Νｍｒイメ−ジング装置 |
| JPS60187005A (ja) * | 1983-12-14 | 1985-09-24 | ゼネラル・エレクトリツク・カンパニイ | 補正コイル |
| JPS61172307A (ja) * | 1985-01-28 | 1986-08-04 | Mitsubishi Electric Corp | 均一磁界発生装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB884129A (en) * | 1957-11-04 | 1961-12-06 | Perkin Elmer Corp | Device for the creation of a magnetic field |
| US4284950A (en) * | 1978-08-05 | 1981-08-18 | E M I Limited | Imaging systems |
| JPS60189905A (ja) * | 1984-03-09 | 1985-09-27 | Mitsubishi Electric Corp | 高均一磁界発生装置 |
-
1986
- 1986-12-19 EP EP86117804A patent/EP0230027B1/en not_active Expired - Lifetime
- 1986-12-19 DE DE3650381T patent/DE3650381T2/de not_active Expired - Fee Related
- 1986-12-24 JP JP61306680A patent/JPS62189056A/ja active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102544A (ja) * | 1983-11-10 | 1985-06-06 | Hitachi Ltd | Νｍｒイメ−ジング装置 |
| JPS60187005A (ja) * | 1983-12-14 | 1985-09-24 | ゼネラル・エレクトリツク・カンパニイ | 補正コイル |
| JPS61172307A (ja) * | 1985-01-28 | 1986-08-04 | Mitsubishi Electric Corp | 均一磁界発生装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02195386A (ja) * | 1989-01-24 | 1990-08-01 | Seiko Epson Corp | 液晶ビデオプロジェクター |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3650381D1 (de) | 1995-10-05 |
| EP0230027A2 (en) | 1987-07-29 |
| JPH0351172B2 (enrdf_load_stackoverflow) | 1991-08-06 |
| EP0230027A3 (en) | 1989-07-26 |
| EP0230027B1 (en) | 1995-08-30 |
| DE3650381T2 (de) | 1996-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |